2000 Mercury Mountaineer Fan was working on high speed only

GRAVEY00

MEMBER
2000 MERCURY MOUNTAINEER
6 CYL
4WD
AUTOMATIC
216,000 MILES

Fan on dash control panel or steering column was working on high only for some time and now has quit working all together. When working only on high I was told it could be a problem with the blower motor resistor but because it has climate control was a fairly expensive part. Didn't try to make or have the repair done even though it was all out heat or blasting cold but now nothing and it 80+ degrees. I need some air flow. Any help would be greatly appreciated

5 Replies

RACEFAN966

MECHANIC
5,029 POSTS

Well you probably do have a bad blower motor resistor. Now if you have a digital multi meter then we can test it.

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Wednesday, June 16th, 2010 AT 10:35 AM

GRAVEY00

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3 POSTS

I do have a digital multi meter - haven't used much and am by no means an electrical wizard but would like instructions to try to test to see if this resistor is bad

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Wednesday, June 16th, 2010 AT 5:09 PM

RACEFAN966

MECHANIC
5,029 POSTS

Ok no problems you do know that at you local parts stores these are only around 22 dollars? Now with that I have included pics of the two types that are used on your truck. Look at them and let me know which type you have so I can walk you through the test ok.

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Thursday, June 17th, 2010 AT 10:51 AM

GRAVEY00

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3 POSTS

It closely matches the bottom picture

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Friday, June 18th, 2010 AT 3:57 PM

RACEFAN966

MECHANIC
5,029 POSTS

Ok use the pic below. I need you to use you meter and check for power at the harness on the two larger terms. So unplug it and then turn key on engine off it fine and then set on low speed and check for power at one then turn to high and check for power on the other. Let me know what you find.